EA Technology CableData CDC2, Руководство по эксплуатации

Страница: 38 / 59

EA Technology CableData Collector Operating Manual 1365/L/01/1
Page 34 of 54
If the Yes button has been clicked then the data will be automatically saved into the same
directory as the other captured data files, with the word Cancelled appended to the file
name. The data file location will be displayed in a message as shown in Figure 44. To close
this window, click
OK .
Figure 44 - Message informing cancelled data file location
10.4.11 Repeating Data Capture
If a data capture has been performed with the same settings, a warning will appear stating
that the capture is the same as a previous capture. If this is correct and the same cable is
being tested, then the
Yes button should be pressed to repeat the measurement. If this is
not correct then the No button should be clicked and the cable details updated accordingly.
Figure 45 - Warning when repeating data capture
10.4.12 Data Capture Process
There are different sequences for single and three phase capture. The data capture process
collects two types of data; Raw data and waveforms. Raw data is used to generate the
phase plots. The raw data capture is a 15 second run where all of the events detected are
recorded. This stage will always take 15 seconds for each filter.
Waveform data is used to map the location of the fault on the cable. During the data capture
process, the data collection will switch between the two. In addition to this, the filter that is in
use will also be changed to remove as much noise as possible from the collected data. The
waveform capture time is dependent on the levels of partial discharge on the cable, and also
depends on the level of background noise. If there is a quiet cable with very little activity and
very little background noise, each waveform stage may take several minutes. For a cable
with lots of partial discharge activity occurring, the waveform capture stages will be quicker.